000 00524nam a2200109Ia 4500
008 200102s9999 xx 000 0 und d
010 _z5783769460225662660
080 _a159.922.7
100 _aINHELDER BARBEL PIAGET JEAN
245 4 _aTHE GROWTH OF LOGICAL THINKING
260 _cBD
999 _c751
_d751